CVE-2026-57874 Overview
CVE-2026-57874 is an unauthenticated buffer overflow vulnerability in the IEEE8021x_upload.cgi component of GeoVision GV-LPC2011 and GV-LPC2211 license plate capture devices running firmware V1.12 and earlier. The flaw stems from insufficient bounds checking when the CGI handler parses filename values within multipart upload requests. A remote attacker can send a crafted HTTP upload request containing an overly long filename to corrupt memory on the device. Successful exploitation causes a denial of service against the affected camera. The vulnerability is classified under [CWE-120] (Classic Buffer Copy without Checking Size of Input) and requires no authentication or user interaction.
Critical Impact
Remote, unauthenticated attackers can crash affected GeoVision license plate capture devices over the network by sending a single crafted multipart upload request.
Affected Products
- GeoVision GV-LPC2011 (firmware V1.12 and earlier)
- GeoVision GV-LPC2211 (firmware V1.12 and earlier)
- IEEE8021x_upload.cgi component on affected firmware
Discovery Timeline
- 2026-06-26 - CVE-2026-57874 published to NVD
- 2026-06-26 - Last updated in NVD database
Technical Details for CVE-2026-57874
Vulnerability Analysis
The vulnerability resides in the IEEE8021x_upload.cgi binary, a CGI handler exposed by the GeoVision device web interface for uploading IEEE 802.1x authentication configuration files. When the handler processes an HTTP POST request encoded as multipart/form-data, it extracts the filename parameter from the Content-Disposition header of each part. The handler copies this filename value into a fixed-size stack or heap buffer without validating the input length. Sending a filename longer than the destination buffer triggers memory corruption. The overflow condition impacts availability and can crash the CGI process or the web server on the device.
Root Cause
The root cause is missing input length validation on attacker-controlled multipart header fields. The developer relied on an unsafe string copy routine to move the filename value into a fixed buffer. No length check is performed before the copy, so any filename exceeding the buffer size overwrites adjacent memory. This pattern maps directly to [CWE-120].
Attack Vector
The attack requires only network access to the device web interface. No credentials, tokens, or prior interaction are needed. An attacker sends a crafted POST request to /IEEE8021x_upload.cgi with a multipart/form-data body. One part contains a Content-Disposition header where the filename attribute holds a long payload string. Processing the malformed request corrupts memory and produces a denial of service. Exploitation does not require valid IEEE 802.1x configuration data. Additional technical information is available in the GeoVision Cyber Security Resource.
Detection Methods for CVE-2026-57874
Indicators of Compromise
- HTTP POST requests to /IEEE8021x_upload.cgi originating from unexpected external or internal sources.
- multipart/form-data requests where the filename attribute in Content-Disposition exceeds typical filename lengths (for example, more than 256 bytes).
- Web service crashes, watchdog reboots, or repeated unavailability of the GeoVision device management interface.
Detection Strategies
- Deploy network intrusion detection signatures that flag oversized filename fields in multipart uploads targeting GeoVision CGI endpoints.
- Monitor web access logs on the device or upstream proxy for repeated requests to IEEE8021x_upload.cgi.
- Correlate device reboots or connectivity loss with upstream HTTP request patterns to identify probing activity.
Monitoring Recommendations
- Alert on any inbound request to GeoVision management interfaces from outside the designated administrative network segment.
- Track device uptime and reachability metrics to detect repeated crashes indicative of exploitation attempts.
- Log and review all multipart uploads to embedded devices, capturing filename length and source IP for retrospective analysis.
How to Mitigate CVE-2026-57874
Immediate Actions Required
- Restrict network access to the GV-LPC2011 and GV-LPC2211 web management interface using firewall rules or ACLs, allowing only trusted administrative hosts.
- Place affected devices on an isolated VLAN with no direct exposure to the internet or general user networks.
- Contact GeoVision support and monitor the GeoVision Cyber Security Resource for firmware updates addressing this issue.
Patch Information
At the time of publication, the NVD entry references the GeoVision Cyber Security Resource as the vendor advisory location. Administrators should upgrade affected GV-LPC2011 and GV-LPC2211 units to a firmware release later than V1.12 once the vendor publishes a fixed version.
Workarounds
- Disable or block external access to /IEEE8021x_upload.cgi at the network perimeter or via a reverse proxy where feasible.
- Enforce source IP allowlists on the device management interface so only trusted operator workstations can reach the CGI endpoints.
- Monitor device availability and automatically alert on repeated reboots or CGI service failures pending firmware remediation.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
